Question

求各位学霸帮帮忙。

Answer 1

 中并如卖启蔽蔽

追问

谢谢你

追答

^_^

Answer 2

0.7x=2.94
0.7x\0.7=2.94/0.7
x=4.2

Answer 3

0.7x=2.94
x=4.2

Answer 4

0.7x=2.94
x=4.2

Answer 5

(1一0.3)X=2.94

追答

0.7x=2.94

Answer 6

0.7x=2.94 x=4.2